Fix original message position 🤦

Author: akaita

README.md

@@ -142,7 +142,7 @@ Example (pointing to my own faulty code in `com.akaita.fgas.activities.TopActivi
 ```java
 FATAL EXCEPTION: main
 Process: com.akaita.fgas.debug, PID: 22538
-java.lang.Throwable: caused by java.lang.NullPointerException: The mapper function returned a null value.
+java.lang.Throwable: The mapper function returned a null value.
    at io.reactivex.internal.functions.ObjectHelper.requireNonNull(ObjectHelper.java:39)
    at io.reactivex.internal.operators.observable.ObservableMap$MapObserver.onNext(ObservableMap.java:59)
    at hu.akarnokd.rxjava2.debug.ObservableOnAssembly$OnAssemblyObserver.onNext(ObservableOnAssembly.java:55)
@@ -162,7 +162,7 @@ java.lang.Throwable: caused by java.lang.NullPointerException: The mapper functi
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1133)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:607)
    at java.lang.Thread.run(Thread.java:761)
-Caused by: java.lang.Throwable
+Caused by: caused by java.lang.NullPointerException: The mapper function returned a null value.
    at io.reactivex.internal.functions.ObjectHelper.requireNonNull(ObjectHelper.java:39)
    at com.akaita.fgas.activities.TopActivity.onResume(TopActivity.java:205)
    at android.app.Instrumentation.callActivityOnResume(Instrumentation.java:1269)

rxjava2debug/src/main/java/com/akaita/java/rxjava2debug/ExceptionUtils.java

@@ -51,10 +51,10 @@ private static Throwable reverseAndCollapseCauses(@NonNull List<Throwable> cause
 
         Throwable topThrowable = null;
         for (int i = causes.size() - 1; i >= 0; i--) {
-            if (i > 0) {
-                topThrowable = new Throwable(causes.get(i).getMessage(), topThrowable);
-            } else {
+            if (i == causes.size() - 1) {
                 topThrowable = new Throwable(topMessage, topThrowable);
+            } else {
+                topThrowable = new Throwable(causes.get(i).getMessage(), topThrowable);
             }
 
             if (causes.get(i).getStackTrace() != null) {